Rosemount 3402 ApplicationInterface Module (AIM) - August 2003

Product Data Sheet00813-0100-4641, Rev CB

August 2003 Rosemount 3402

www.rosemount.com

• Microprocessor-based electronics

• RS-485 and RS-232 Modbus™ outputs

• Multiple Modbus host support

• Multidrop capability

• Communication LEDs

• Full two-way communication

Content

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5

Hazardous Locations Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 5

Dimensional Drawings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 8

Rosemount 3402 Application

Interface Module (AIM)


August 2003Rosemount 3402

2

AIM FEATURES AND BENEFITS

• Microprocessor-based electronicsprovide maximum system flexibility to accommodate various tank architectures.

• Modbus RS-232 and RS-485 communication outputallows easy integration of HTG tank information into control systems or other Modbus masters.

• NEMA 4X enclosuremakes it suitable for use in ordinary locations.

• Internal power supply for tank-mounted equipmentprovides power for up to 14 Rosemount 3201 HIUs and 3202 SAMs.

• Full, two-way communicationsact as a transparent window between the user and individual tank gauge data bases.

• Multidrop capabilityallows up to 31 3402 AIMs to be multidropped on a common RS-485 bus.

INTRODUCTION

The 3402 Application Interface Module (AIM)* serves

as the interface for the Rosemount 3201 Hydrostatic

Interface Unit (HIU) and 3202 Smart Application

Module (SAM). It provides standard RS-232 and

RS-485 Modbus™ outputs to host systems. The

Modbus communication provides process variables,

alarms, and configuration data residing in the HIUs

and SAMs to a wide variety of host systems.

Fisher-Rosemount Control Systems, other

distributed control systems, host computers, and

personal computers are all examples of the HTG

system flexibility. Figure 2 shows a typical system

architecture.

The 3402 AIM powers and communicates with up to

14 3201 HIUs or 3202 SAMs in any configuration on

a 2-wire Modbus Communication and Power (MCAP)

network. The AIM itself requires 115 V ac or 230 V ac

power and can be field or control room mounted.

This power and communication scheme allows easy

connection to existing Modbus communication

highways and makes optimum use of existing wire

runs.

FIGURE 1. The Hydrostatic Tank Gauging System Components

Furthermore, the AIM features MCAP and Modbus

communication LEDs and extensive lightning and

surge protection to ensure maximum system uptime.

MICROPROCESSOR-BASED ELECTRONICS

The 3402 AIM is built around the same stand-alone

modular concept used in all HTG system

components. With its built-in microprocessor, the AIM

converts the MCAP signal to standard RS-232 and

RS-485 Modbus. As shown in Figure 4, multiple

AIMs can be run on a common RS-485 bus to a host

system, providing the flexibility to readily increase

system size, or segregate tank-farm areas for

increased reliability.

The AIM can also be user-configured to act as a

master to other AIMs. In this configuration, the

master AIM will verify the integrity of the data from

the host device and repeat the data to the other AIMs

connected on the RS-485 highway. The master AIM

also sends the data on its own MCAP line to HIUs

and SAMs. Figure 4 illustrates this configuration.

HTG-008AB


August 2003

3

Rosemount 3402

COMMUNICATION FLEXIBILITY

The Rosemount 3402 AIM communicates with the

host device using a 2- or 4-wire RS-485

implementation and an RS-232 serial communication

implementation of the Modbus protocol. The AIM

arbitrates between multiple Modbus masters

providing two RS-232 ports and one RS-485 port.

The RS-485 implementation allows up to 31 devices

(AIMs) to be multidropped on a single Modbus

network. The Modbus network also supports a total

of 247 Modbus addresses with each HIU or SAM

counting as one Modbus address.

Modbus protocol users can easily increase the level

of automation in their tank farms by passing

information from the Rosemount HIU or SAM to other

Modbus-compatible devices. This allows integration

of functions, such as pump and valve control with the

high-accuracy measurements from the HTG system.

The Modbus Communication and Power (MCAP)

network allows the HIUs and SAMs to be

multidropped on a single 2-wire network, thereby

minimizing wiring costs and increasing

communication flexibility.

APPLICATION FLEXIBILITY

The 3402 AIM installation options allow users to

integrate the Rosemount Hydrostatic Tank Gauging

(HTG) System easily with any existing tank farm

architectures. This provides maximum flexibility to

meet today’s tank farm requirements while providing

an automation path for future

HTG systems.

The 3402 AIM requires very little configuration. A

switch bank exists for proper MCAP and Modbus

settings. One switch determines if the AIM acts as a

master to other AIMs.

DIAGNOSTIC CAPABILITY

The 3402 AIM passes all of the HIU and SAM

diagnostic data to the host system. In addition,

multiple LEDs provide a visual indication of all

communication port activity. These diagnostic

features allow for easy system troubleshooting.

FIGURE 2. Hydrostatic Tank Gauging System Architecture

Rosemount 3402

Application

Interface

Module (AIM)

RS-485 Modbus Communications Network

HART Protocol

Rosemount 3201 HIU

or

Rosemount 3202 SAM

(PT)Top Pressure

Transmitter

(PM)Middle

Pressure

Transmitter

RTDTemperature

Sensor

(PB)Bottom Pressure

Transmitter

Host System

HT

G-0

104A

01DMCAP

Network



4

FIGURE 3. RS-485 Host Device Configuration

FIGURE 4. Master AIM Configuration

Rosemount

3201 HIU

Rosemount

3202 SAM

Rosemount

3201 HIU

Rosemount

3202 SAM

Rosemount

3402 AIM

RS-485 Modbus

To Host Device

(Two RS-232

Ports)

Rosemount

3402 AIM

3402

-000

0A03

C

Modbus Communications

and Power (MCAP)

Up to 14 Rosemount 3201

HIUs

or 3202 SAMs

(Any Combination)

Modbus Communications

and Power (MCAP)

Up to 14 Rosemount 3201

HIUs

or 3202 SAMs

(Any Combination)

Up to 31

Devices

Total

(Any

Combination)

Host System

To Host Device

(Two RS-232

Ports)

The 3402 AIM has one RS-485

port and two RS-232 ports.

When AIMs are multidropped on

a RS-485 network and

connected to a host device, the

RS-232 ports can be used by

other host systems to

communicate with the HIUs and

SAMs connected to that AIM. In

this configuration the RS-232

port of one AIM cannot

communicate with HIUs or SAMs

connected to another AIM.

Figure 3 shows the lines of

communication for a network

using a straight RS-485 host

device configuration.

The 3402 AIM has one RS-485

port and two RS-232 ports.

When AIMs are multidropped on

the RS-485 network and one

AIM is used as the master AIM,

one RS-232 port communicates

with the host device. The

second RS-232 port on the

master AIM may be used with a

host to communicate to any HIU

or SAM connected to any of the

AIMs on the RS-485 network.

Figure 4 shows the lines of

communication for a network

using a master AIM

configuration.

Rosemount

3201 HIU

Rosemount

3202 SAM

Rosemount

3201 HIU

Rosemount

3202 SAM

Rosemount

3402 Master

AIM

RS-485 Modbus

Rosemount

3402 AIM

RS-232

3402

-000

0A03

D

Host System

Modbus

Communications and Power

(MCAP)

Up to 14 Rosemount 3201 HIUs

or 3202 SAMs

(Any Combination)

Modbus

Communications and Power

(MCAP)

Up to 14 Rosemount 3201 HIUs

or 3202 SAMs

(Any Combination)

Up to 31

Devices

Total

(Any

Combination)


August 2003

5

Rosemount 3402

Specifications

Functional Specifications

Power Input Options

115 V ac, 58/62 Hz 230 V ac, 48/62 Hz

Power Quality Requirements

115 V ac: 103.5 to 126.5 V ac

230 V ac: 207 to 250 V ac

MCAP Power Options

Standard: 48 V dc nominal

(47 V dc min., 49 V dc max.), up to 500 mA

Low Voltage: 31 V dc nominal

(30 V dc min., 32 V dc max.), up to 500 mA

MCAP Power Limitations

Up to 14 Rosemount 3201 HIUs or 3202 SAMs (in any

combination) each drawing 31.5 mA with two HART® devices.

Environmental

Operating Temperature Range: –40 to 70 °C (–40 to 158 °F)

Operating Humidity Range: 0–95% relative humidity

(non-condensing)

NEMA 4X protection standard

Lightning and Surge Protection

Surge protection is provided on the 3402 MCAP lines and on the

Modbus RS-485 communication lines. This surge protection meets

the requirements of ANSI/IEEE C62.41-1980

categories A and B.

RFI/EMI

Per SAMA PMC 33.1-1978 Class 2

Performance Specifications

Device Signal (MCAP)

2-wire Modbus Communication and Power (MCAP) data highway

supporting up to 14 devices.

Host Signal

2- or 4-wire Modbus RS-485 multidrop

Two Modbus RS-232 ports. One port user selectable to operate as

a DTE or DCE.

Baud Rate

MCAP Network: user selectable 38400 or 9600

Modbus Host Network: user selectable 19200, 9600, 2400, or

1200

Data Type

Modbus RTU or ASCII

Physical Specifications

Weight

10.7 lb (4.85 kg)

Wiring

MCAP Signal Wiring: one twisted shielded pair, 18 AWG. Wiring

distance is approximately 5,000 feet (1,524 meters) with 14 HIUs

or SAMs, in any combination with 2 HART devices connected. For

more information, see the HIU product data sheet–PDS 4640.

Modbus Host Signal Wiring: RS-485 one or two twisted shielded

pair, 18 AWG. Wiring distance is approximately 5,000 feet (1,524

meters). RS-232 standard serial communication with a RJ45 type

connector which can be used with a 25-pin male or female

connector or a 9-pin male or female connector. Wiring distance is

approximately 50 feet (15.24 meters).

NOTE

One 25- or 50-foot (7.62 or 15.24 meters) cable with 9- or 25-pin

connector can be provided with each AIM. See the ordering table

for more information.

Hazardous Locations Certifications

Factory Mutual (FM) Approval

N5 Approved for Class I, Division 2, Groups A, B, C, and D;

Dust-Ignition Proof, Class II and III, Division 1, Groups E, F,

and G, hazardous locations. Indoor and outdoor (NEMA 4X).

Temperature code T4.

Canadian Standards Association (CSA) Approval

N6 Approved for Class I, Division 2, Groups A, B, C, and D;

Dust-Ignition Proof, Class II and III, Division 1, Groups E, F,

and G, hazardous locations. Indoor and outdoor (CSA

enclosure 4). Temperature code T4A.

Location

Category

Wave

form

Medium

Exposure

Amplitude Type of Load

A .5�s–

100KHz

6KV

200A

High Impedance

Low Impedance

B 1.2 � 50�s

8 � 20 �s

6KV

3KA

High Impedance

Low Impedance

.5�s–

100KHZ

6KV

500A

High Impedance

Low Impedance



6

Dimensional Drawings

FIGURE 5. Rosemount 3402 Application Interface Module Dimensional Drawing.

3.51

(89) 2.81

(71)

3.11

(79)

9.01 (229)

0.44 (11)

11.15

(283)

12.01

(305)

11.37

(289)

17.78 (452)

Approval Label

Nameplate

Cast

Aluminum

Cover

Junction

Box Cover

2.96

(75)

Warning

Labels

¾–14 NPT

Conduit

Connection

(Three places)

Ground LugNOTE

Dimensions are in inches (millimeters).


August 2003

7

Rosemount 3402

FIGURE 6. Rosemount 3402 Application Interface Module Detailed View

Cast Aluminum Housing

Terminal Block and Replaceable Fuse

Warning

Labels

Power Supply Board

Microprocessor Board

MCAP

Terminator

Cable

25-Pin (or 9-Pin)

Connector

Cast

Aluminum

Cover

Warning Label

Warning Label

RS-232

Ports

Junction

Box

Cover

3402-0

001C

04A

0001B

04A

01

00A

01A

, 3402-0

000A

01A


August 2003 Rosemount 3402

Emerson Process Management

© 2004 Rosemount Inc. All rights reserved.

Rosemount and the Rosemount logotype are registered trademarks of Rosemount Inc.PlantWeb is a mark of one of the Emerson Process Management companies.All other marks are the property of their respective owners.Cover Drawing: 3402_0000b02c

¢00813-0100-4641Z¤

Rosemount Inc.8200 Market BoulevardChanhassen, MN 55317 USAT (U.S.) 1-800-999-9307T (International) (952) 906-8888F (952) 949-7001

www.rosemount.com

Emerson Process ManagementHeath PlaceBognor RegisWest Sussex PO22 9SHEnglandTel 44 (1243) 863 121Fax 44 (1243) 867 5541

Emerson Process Management Asia Pacific Private Limited1 Pandan CrescentSingapore 128461T (65) 6777 8211F (65) 6777 0947/65 6777 0743

Ordering Information

Rosemount Smart Family® Instruments

Rosemount SMART FAMILY instruments include pressure,

temperature, level, and flow measurement.

All SMART FAMILY instruments are designed to communicate

using HART (Highway Addressable Remote Transducer) protocol

with the hand-held HART Communicator and Fisher-Rosemount

Control Systems.

Model Product Description

3402 Application Interface Module (AIM)

Code Power Input Option

A 115 V ac Power Input

B 230 V ac Power Input

Code MCAP Output Option

1 Standard Output (48 V dc nominal)

2 Low Voltage Output (31 V dc nominal)

Code RS-232 Cable Length Option

A None

B 25 ft (7.62 meters)

C 50 ft (15.24 meters)

Code RS-232 Connector Option

A None

B RJ45 to DB25 Male

C RJ45 to DB25 Female

D RJ45 to DB9 Male

E RJ45 to DB9 Female

Code Number of MCAP Line Terminators

1 One Line Terminator

2 Two Line Terminators

3 Three Line Terminators

Code Options

N5 Factory Mutual (FM) Division 2 Approval (Non-incendive)

N6 Canadian Standards Association (CSA) Approval

Q8 Material Traceability Certification per EN102043.IB

Typical Model Number: 3402 A 1 B C 1 N6

SMART FAMILY Companion Products

00813-0100-4275 HART Communicator

Hydrostatic Tank Gauging

00813-0100-4635 Rosemount 3001C Hydrostatic Pressure Transmitter

00813-0100-4638 Rosemount 3001CL Flush-mount Hydrostatic

Pressure Transmitter

00813-0100-4640 Rosemount 3201 Hydrostatic Interface Unit

00813-0100-4641 Rosemount 3402 Application Interface Module

00813-0100-4646 Rosemount 3202 Smart Application Module

00813-0100-4702 Rosemount 3001CH Hydrostatic Pressure

Transmitter for High Process Temperatures

Documents

Rosemount 3402 ApplicationInterface Module (AIM) - August 2003